OFPST_PORT_DESC reply (xid=0x2):
 1(vlan21): addr:66:40:63:8c:50:f1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:5e:40:8d:7f:4b:28
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:12:7d:54:d8:aa:9c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:a5:dd:79
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:a5:dd:79
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
